George h



(1810 Model.)

G. H. ALTON.

'DOUBLE POLE SWITCH.

No. 428,586. Patented May- 27, 1890.

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GEORGE H. ALTON, OF LYNN,MASSACHUSETTS, ASSIGNOR TO THE THOMSON- HOUSTONELECTRIC COMPANY, OF SAME PLACE.

DOUBLE-POLE SWITCH.

` SPECIFICATION forming part of Letters Patent No. 428,586, dated May27, 1890.

Application led October 26,1888. Serial No. 289,245. (No model.)

To @ZZ whom it may concern: thelever is in the position shown in Fig. 2Be it known that I, GEORGE H. ALTON, a the circuit will be open, whileon tilting the citizen of the United States, and a resident lever intothe other position the circuit will of Lynn, in the county of Essex andState of be closed through the impingement of the 5 Massachusetts, haveinvented a certain new ends of the lever against the free ends of the 55and useful Double-Pole Switch, of which the springs by a slidingcontact.

following is a specification. F indicates a plate of any suitable mate-My invention relates to electric switches or rial-such as iron-havingtwo cams D D, cast turn-offs of the class which is specially conin onepiece, preferably, with the said plate 1o structed to produce a quick orsnapping ac- F, the latter forming a means for securing` the 6o tion inopening or closing an electric circuit. double cam to the base-plate A.The cam- The object of my invention is to provide surfaces D D arearranged in the circumferan electric switch adapted to operate in theence of a circle andthe offset or step between manner stated, and ofsimple, cheap, an'd the upper end of one cam and the beginning i 5durable construction. or lower portion of the succeeding cam is in- 65My invention consists in the special conldicated at E. The switchdever Cturns upon binations and improvements in details of a pivot G in thecam-plate and is arranged construction, to be more particularlyhereinwith its ends at the step or olt'set, as clearly after describedin connection with the accomindicated.

zo pa'nying drawings, which form a part of this I indicates Ya rotarvspindle, which is 7o specification, and to be then more specilicallymounted to turn in a yoke H, that is secured defined in the claims. uponthe top of the plate F. The spindle I In the accompanying drawings,Figure l is carries the operating knob or handle T, and an elevation ofa switch embodying my inalso a spring K, which may be made as a 25vention, the casing being shown in section. spiral spring and which hasone endxed in 75 Fig. 2 is an elevation of the apparatus, the thespindle, while its other or free end is arview being taken on a line atright angles to ranged to ride upon and press with considerthat ofFig. 1. Fig. 3 is a plan of the appaable force against the surface ofthe cams ratus, the casing being removed. Fig. 4. is a D D. Thepivot-lever C carries also an indi- 30 perspective view of thecam-plate. Fig. 5 is eating-plate L, mounted on arms projecting 8o avertical section through the apparatus on from the plate and providedwith characters the line of the switch-lever. or indications, as shown,which move behind A indicates a base of wood or other suitaan opening Min the casing N for the deble material, upon which are mounted thevices, and which, being alternately exposed 3 5 springs B B B2 B2, towhich electrical connecat said opening, serve to indicate the position85 tion is made by binding-screws or any other of the switch-that is,whether on or off. desired means. In order to assist the switch-lever inmov- C indicates a switch-lever that by making ing from one position tothe other,.I combine and breaking contact with said springs serves withthe same a suitable spring, as clearly 4o to open and close the electriccircuit or cirindicated in Fig. 5. Said spring consists of a 9o cuits,blade-spring, one end of which enters a notch In the presentA instancewe may consider in the lever, as clearly shown, while the other thesprings B B as forming one terminal or end enters a notch in thebase-plate. The pole, and the springs B2 B2 as forming the base-platehas a notch or opening'to receive 45 other terminal or pole of thecircuit, so that the bent portion of the spring when the lever 95electric connection is closed by the lever C( tilts. when the same makescontact with both sets In the drawings the devices are shown in ofsprings simultaneously. The free ends of the position which they assumejust after the the springs B B are elevated above the plane operation ofthe switch-lever C by the spring 5o of the free ends of springs B2, sothat when K, the free end d of which is shown as just roo having passedthe step betwecn the two cams. On turning the spindle the free end (t ofthe spring rides up the cam D, and on passing' the step or oitset ofsaid cani engages with the end of the lever C, which by the previousoperation of the spring has been tilted up into the position shown inFig. The spring, having been placed byits rotation under considerablecompression, strikes forcibly upon said lever and turns the saine intothe opposite position, where the circuit will be closed. n continuingthe motion of the spindle the spring will ride up the secondcani-surface D, and iinally passing the step or offset will assume theposition shown in the fignres,thereby tilting the lever back into itsoriginal position. In the tilting operation the indications upon theplate L will be inoved backward and forward into and out of position forobservation at the opening end in obvious manner.

In the foregoingdescription and in my claims I use the terniswitch-leverasmeaning that clement of an electric switch that operatesupon or in conjunction with suitable electric contacts or terminals soas to produce the desired changes in the condition ot the electriccircuit, and it is to be understood, therefore, that wherever such terniis used by nie the ordinaryor suitable eo-operating electric terminalsare included by' implication.

lVhat I claim as my invention isl. In a snap-switch, the combination,with the two cams, of the switch-lever arranged with its ends at theoitset between the end of each cani and thebeginningof the other, and arotary propelling-spring engaging with said cani-surfaces and adapted to`engage directly with said lever as the spring leaves one cani to engagewith the beginning of the other.

i. The combination, substantially as described, with a rotary spindle orshaft, of the two cams, the impelling-sprng carried by the spindle andengaging the cams with its free end, and an oscillating' switch uponwhich the said tree end of the spring impinges directly when the springpasses from one cam to the other.

rlhe combination, with the tilting switchlever, of the double cam, thecontrollingspring engaging with the cams and adapted to strike thetilting switch-lever as the spring leaves one cani to engage with thenext, and a tilting or rocking indicator carried by the switch-lever andprovided with indicating marks or signs moving behind an opening in thecase.

l. The double cainplate cast in one piece and having the switch-leverpivoted in it, in combination with the rotary spindle carrying theactuator which moves over the cams and impingcs upon the lever at theoffsets or steps.

5. The combination, with the double camplate secured to a suitablebase-p1ate,o1": a switch-lever pivotcd in the cam-plate itself, a yokeor trame fastened upon and supported by said cam plate, an operatingspindle mounted on. and borne by the yoke, and an actuating devicerotated thereby and adapted to ride upon the cam-plate.

Signed at Lynn, in the countyof Essex and State of Massachusetts, thisth day ot' October, A. I). ISSS.

GEORGE II. ALTON.

Vftncsses:

J. W. GIBBONEY, G. F. CURTISS.

